Si-based On-chip Optical Interconnects

1. Si-based On-chip Optical Interconnects Shang Wang ECE423 12/16/06

3. Disadvantages of Electrical Interconnects Scaling Problem —— ”Aspect Ratio” Limit However, optical interconnects do not have such problem!

4. Other Advantages of Optical Interconnects • Timing Accuracy • Design Simplification • voltage isolation • Absence of wave reflection and impedance matching • avoid inductive crosstalk • frequency independence

5. On-chip Optical Interconnect Data Path On-chip Silicon Optical Modulator Si-based Photo Detector Silicon Laser Silicon Waveguide Driver Amplifier Electrical Logic Cell Electrical Logic Cell

6. Si-based Light Source ——Raman Silicon Laser Simulated Raman Scattering (SRS) A reversely biased p-i-n diode to eliminate the TPA-induced FCA

7. Silicon Optical Modulator metal-oxide-semiconductor (MOS) capacitor Mach-Zehnder Interferometer (MZI)

8. Si-based Photo detector SiGe multiple quantum wells (MQW)

9. Conclusion • The concept of optical interconnect brings a brilliant future for the dense interconnects to the silicon chips. • The recent achievement in Intel of the silicon laser, silicon optical modulator and silicon-based photodetector shows the potential of monolithic integration of silicon-based optoelectronics.

10. Thank you!